Life preserver



Aug. 26, 1930. A AYVAD v 1,773,932

LIFE PRESERVER Filed June 22, 29

Fig. 1

Inventor, Ha-chig A Ayvad,

3 Y Ag rney' Patented 26, g 7 i 'BAOHIGVIA' Airvni), or WEST NEW YORK,

' MANUFACTURINGCOMPANYLOF HOBOKEN, NEW annsnmnconronnrlon on NEW J RSEY] I Application filed lune 22,

The object of this'inventionis to provide an inflatable life-preserver in the form of 'a tubular ring whichvis made of Woven;v fabric and is economically manufactured. j I g In theaccompanying sheet .ofdrawings which forms a partof this description,

woven fabric cut'to therequired-shape for 'foimin'g into alife preserver according to It; thislinvention. v

Fig.a2lshows the ends "sewed together as Y the next step in themanufacture.

Fig. 3 shows thecompleted life-preserver.

Fig. 4 shows the seam which unites the :5 ends. r Y a v.

' Fig. 5 is a sectionthrough the ring to show 10w the side edges of the fabric are brought together andjoined. V

The life-pieserver is formed froma strip iii? of closely woven fabric 10, usually cotton,

, which when wet is impervious to air at the, ,shght pressure required'in a life-preserver.

, The ends of this strip are preferably slightly new. annsnxnssrenoa roman AYVAD unn PRESERVE V 1929. {semi me'ras'se.

sho t distanceiopposite' where the ends are joined; At this point the seam is not closed. This tape also is alittle longer than the edges which it is to. cover and a short length at each end is unattached adjoining the opening I in the. seam and the-unattached ends of the Figure 1 shows thetwo endsof a striplof other tape; Into the opening a'valve 15- is oftape are wrapped around and bound to it.

' I claim:

wovenfabric into a tubular ring with an.

uninterrupted annular inflatable i space in which the ends of'the strip areunited by a=- lock stitch extending to the'interior side ofthe tubular ringandthe side edges of the strip are united b V a lock stitch both sides of which are outside of'the. tubular ring. HACHIG A AYVAD.

notched so that the strip is slightlylonger at I its edges than along its median line. This is to provide a little fullness where a valve is to be inserted so that the ring will not be distorted by the valve.

. V In manufacturing, the ends are brought together and lapped evenly. A piece of tape A, life preserver' formed from a strip ofv 11 a littlelonger-than the width ofthe strip of fabric is laidover the-lapped ends and'the three'layers of fabric and tape are stitched'togetheron a sewingmachine with several rows f of lock stitches 12, 12. -Both ends of the tape 1 extend a little beyond the lapped edges of the fabric. As the fabric has not yet been formed" I I into a tube both sides, areaccessibleto the sewing machine and the fine stitching necessary to make the seam airtight is readily: made. Such stitching would not be economi cal if it were necessary to do it by hand, r y Having thus formedthe fabric into a band,

it is next folded lengthwise to bring the two "side edges together. A strip ofjtape 13 is folded over. the edges and sewed to the edges by lines of stitching 14', 14,1 which lead through the meeting edges and twice through the tape. The lines of stitching are -carried 9 around the edge of the,ringi except for' a. 

